[Scarlett.]

Simpsons roasting on an open fire
Lisa's pageant costume, which ran into trouble with the censors. It was later added that she was wearing pants. It can be seen that from the waist down, it is a different shade of yellow, meaning she was wearing pants.

Some enchanted evening

According to the commentary for the episode on the Simpsons Season 1 DVD, a debacle erupted when this episode, the first to return from animation in Korea, was screened in front of the production staff at the Gracie bungalow. The animation was reportedly so appalling and even disturbing that the room had cleared by the time the episode finished playing. In a 1991 interview on the The Tonight Show with guest host Jay Leno, Matt Groening described one of these disturbing scenes in which the kids were watching the happy little elves that featured an add in by the animators in which a baby cub decapitates an elf and drinks the blood from its head.[1] Things hastened by executive producer James L. Brooks' initial reaction, "This is ****!". A heated argument ensued between Brooks and the Klasky-Csupo animation studio head Gabor Csupo; Csupo denied that there was anything wrong with the animation and suggested that the real problem lay with the quality of the show's writing. The producers considered aborting production on the series if the next episode, "Bart the Genius" turned out as poorly, but it turned out to suffer only a few, easily fixable problems.

Afterwards, the producers entreated Fox to push the air date for the series premiere back several months, which was then switched to "Simpsons Roasting on an Open Fire" so that more time could be spent fixing the Korean animation problems with this episode. Management of the retakes was handled by David Silverman, who already had considerable experience directing the Simpsons Tracey Ullman shorts. The episode's production number is 7G01, as it was the first Simpsons episode produced and, if not for the aforementioned animation problems, it would have served as the series premiere.

[MarkWaldorf]

Every time I see that episode with that pageant episode, I wonder if she is actually wearing "pants". I was quite shocked at first. I can't see the different shade though..

[Scarlett.]

neither can I, those Korean animators where the ones who did the first seires, and that was the first episode

[Matt]

I've never noticed them! Top work!